Non-pneumatic tire

A non-pneumatic tire, comprising a tire tread and a tire bead that are concentric, and a tire body that is integrally connected between the tire tread and the tire bead, the tire body is provided with multiple first annular cavities side by side along a width direction of the tire, and the multiple first annular cavities are distributed side by side around a region between the tire tread and the tire bead;

• a second annular cavity is provided between adjacent two of the first annular cavities;
• inner walls on two sides of the first annular cavities separately protrude outwards to form multiple sets of bulges, a recessed portion is formed between adjacent two of the sets of bulges on a same side, a first inner brim is formed at a position of the recessed portion corresponding to an inner wall of the first annular cavity, and inner walls of the bulges on two sides of the first annular cavity form an arc-shaped extension region located at a periphery of the first inner brim;
• and a second inner brim is formed at a position of the second annular cavity corresponding to the arc-shaped extension region, an expansion region located at a periphery of the second inner brim is formed at a position of the second annular cavity corresponding to the recessed portion, and a top of the expansion region has a spherical space close to the tire tread.